T6946: add wrapper for show_commit_data and test function

3 files changed, 77 insertions, 5 deletions

diff --git a/python/vyos/config_mgmt.py b/python/vyos/config_mgmt.py
index 1c2b70fdf..dd8910afb 100644
--- a/python/vyos/config_mgmt.py
+++ b/python/vyos/config_mgmt.py
@@ -287,7 +287,7 @@ Proceed ?"""
 
         # commits under commit-confirm are not added to revision list unless
         # confirmed, hence a soft revert is to revision 0
-        revert_ct = self._get_config_tree_revision(0)
+        revert_ct = self.get_config_tree_revision(0)
 
         message = '[commit-confirm] Reverting to previous config now'
         os.system('wall -n ' + message)
@@ -351,7 +351,7 @@ Proceed ?"""
             )
             return msg, 1
 
-        rollback_ct = self._get_config_tree_revision(rev)
+        rollback_ct = self.get_config_tree_revision(rev)
         try:
             load(rollback_ct, switch='explicit')
             print('Rollback diff has been applied.')
@@ -382,7 +382,7 @@ Proceed ?"""
         if rev1 is not None:
             if not self._check_revision_number(rev1):
                 return f'Invalid revision number {rev1}', 1
-            ct1 = self._get_config_tree_revision(rev1)
+            ct1 = self.get_config_tree_revision(rev1)
             ct2 = self.working_config
             msg = f'No changes between working and revision {rev1} configurations.\n'
         if rev2 is not None:
@@ -390,7 +390,7 @@ Proceed ?"""
                 return f'Invalid revision number {rev2}', 1
             # compare older to newer
             ct2 = ct1
-            ct1 = self._get_config_tree_revision(rev2)
+            ct1 = self.get_config_tree_revision(rev2)
             msg = f'No changes between revisions {rev2} and {rev1} configurations.\n'
 
         out = ''
@@ -575,7 +575,7 @@ Proceed ?"""
             r = f.read().decode()
         return r
 
-    def _get_config_tree_revision(self, rev: int):
+    def get_config_tree_revision(self, rev: int):
         c = self._get_file_revision(rev)
         return ConfigTree(c)
 
diff --git a/python/vyos/configtree.py b/python/vyos/configtree.py
index 4ad0620a5..2b8930882 100644
--- a/python/vyos/configtree.py
+++ b/python/vyos/configtree.py
@@ -488,6 +488,22 @@ def mask_inclusive(left, right, libpath=LIBPATH):
     return tree
 
 
+def show_commit_data(active_tree, proposed_tree, libpath=LIBPATH):
+    if not (
+        isinstance(active_tree, ConfigTree) and isinstance(proposed_tree, ConfigTree)
+    ):
+        raise TypeError('Arguments must be instances of ConfigTree')
+
+    __lib = cdll.LoadLibrary(libpath)
+    __show_commit_data = __lib.show_commit_data
+    __show_commit_data.argtypes = [c_void_p, c_void_p]
+    __show_commit_data.restype = c_char_p
+
+    res = __show_commit_data(active_tree._get_config(), proposed_tree._get_config())
+
+    return res.decode()
+
+
 def reference_tree_to_json(from_dir, to_file, internal_cache='', libpath=LIBPATH):
     try:
         __lib = cdll.LoadLibrary(libpath)
diff --git a/src/helpers/show_commit_data.py b/src/helpers/show_commit_data.py
new file mode 100755
index 000000000..d507ed9a4
--- /dev/null
+++ b/src/helpers/show_commit_data.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2025 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#
+# This script is used to show the commit data of the configuration
+
+import sys
+from pathlib import Path
+from argparse import ArgumentParser
+
+from vyos.config_mgmt import ConfigMgmt
+from vyos.configtree import ConfigTree
+from vyos.configtree import show_commit_data
+
+cm = ConfigMgmt()
+
+parser = ArgumentParser(
+    description='Show commit priority queue; no options compares the last two commits'
+)
+parser.add_argument('--active-config', help='Path to the active configuration file')
+parser.add_argument('--proposed-config', help='Path to the proposed configuration file')
+args = parser.parse_args()
+
+active_arg = args.active_config
+proposed_arg = args.proposed_config
+
+if active_arg and not proposed_arg:
+    print('--proposed-config is required when --active-config is specified')
+    sys.exit(1)
+
+if not active_arg and not proposed_arg:
+    active = cm.get_config_tree_revision(1)
+    proposed = cm.get_config_tree_revision(0)
+else:
+    if active_arg:
+        active = ConfigTree(Path(active_arg).read_text())
+    else:
+        active = cm.get_config_tree_revision(0)
+
+    proposed = ConfigTree(Path(proposed_arg).read_text())
+
+ret = show_commit_data(active, proposed)
+print(ret)